I built my PC a year ago and was workign fine. All of a sudden it is not posting or doing anything at all: 1) I can power it up, the fans and lights will come on, but no video signal, no beeps and no HDD spinning. 2) I can not turn it off with the power switch, neet to turn of the PS. 3) The DVD tray will not open, but the DVD light comes on and stay on. Here is what I have done. a) Checked all voltages on PS (with no load) and all were in spec. b) If I remove the data cable from DVD, and just keep the power attached, then DVD tray will open c) I have swapped the MOBO with an identical (Gigabyte 770-UD3 with no on board video) and same exact thing. Will be grateful for any input.